The most important psychiatric implication of experiencing trauma during war is post-traumatic stress disorder (PTSD). The core symptoms of PTSD are intrusive re-experiencing of traumatic events, hyperarousal in reaction to minor stimuli and avoidance of trauma-related triggers. In this paper we describe the phenomenon of intrusive reexperiencing, of which the post-traumatic nightmare (PTNM) is an impressive manifestation that causes considerable distress (Mellman et al, 1995; Schreuder, 1996; Ørner & de Loos, 1998; Schreuder et al, 1998).